| 摘要: |
| ：矿业开采造成的非点源污染、化学物质迁移等生态
风险过程受到景观格局的显著影响，准确识别源汇景观之间生
态流所形成的风险路径，是科学干预生态风险、精准实施生态
治理的前提。以中国最重要的镁矿基地大石桥市为研究区，在
实地样本检测的基础上，考虑地形、土壤、水文等外部条件对
镁离子非点源污染过程的影响，在改进的最小累积阻力模型
中，引入了包括地形湿度指数、CN值、特征污染物浓度等影
响因子构建阻力面，识别镁离子输出风险区与空间迁移的风险
路径。针对风险路径的空间分布，提出了加强景观连通度与降
低风险暴露度的修复策略，调整风险路径密集区域用地的结构
与组分，提升景观结构对风险扩散的阻断能力，构建了“三区
两源、一轴五带、多廊多点多组团”的生态格局，从格局优化
的途径实现对风险过程的干预。 |
| 关键词: 风景园林 生态风险 路径 景观格局 生态过程 矿业城市 |
| DOI： |
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| 基金项目: |
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| Ecological Pattern Optimization of Mining Cities Based on Ecological Risk Path Identification and Risk Process Intervention |
| LI Sui,WU Shangyu,SHI Tiemao,ZHOU Shiwen,ZHOU Xueke |
| Abstract: |
| The ecological risk processes such as non-point source
pollution and chemical substance migration caused by mining
are significantly affected by the landscape pattern. Accurately
identifying the risk path formed by the ecological flows between
the source and sink landscapes is a scientific intervention in the
ecological risk and precise implementation of ecological governance
Premise. This article takes Dashiqiao City, the most important
magnesium mine base in China, as the research area. Based on field
sample testing, considering the impact of terrain, soil, hydrology
and other external conditions on the process of magnesium ion
non-point source pollution, the minimum cumulative resistance is
adopted in the model, influencing factors including terrain humidity,
underlying surface CN value, and pollutant concentration are
introduced to construct a resistance surface, and the risk path of
magnesium ion output risk area and spatial migration is identified.
Aiming at the spatial distribution of risk paths, a restoration strategy
to strengthen landscape connectivity and reduce risk exposure is
proposed, and the structure and composition of land used in dense
risk paths are adjusted to construct three areas, two sources, one
axis, five belts, and multiple corridors and multiple points. The
multi-cluster ecological pattern realizes intervention in the risk
process through pattern optimization. |
| Key words: landscape architecture ecological risk path landscape
pattern ecological process mining city |
